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1. 发明专利

JP2001076478A MAGNETIC DISK DEVICE 失效
公开(公告)号：JP2001076478A
公开(公告)日：2001-03-23
申请号：JP24964199
申请日：1999-09-03
申请人： HITACHI LTD
发明人： HIGASHIYA TERUYOSHI , TANAKA HIDEAKI , TASAKA KENJI , AKAMATSU NAOTOSHI , AZUMA KAZUFUMI , OTSUKA MASAKI
IPC分类号： G11B33/14 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To remove gaseous siloxane from the region between a magnetic disk slider and a magnetic disk and to obviate the occurrence of trouble, such as head crash, by arranging active carbon as a gas adsorbent on the magnetic disk-facing surface side of a magnetic head supporting mechanism. SOLUTION: The magnetic head supporting mechanism 10 has components, such as a load beam 21 for pressing the magnetic head slider 20 to be mounted with a magnetic head to a magnetic disk surface in order to support the magnetic head slider 20 and a flexure 22, for connecting the magnetic head slider 20 and the load beam 21. The gas adsorbent 30 is stuck by an adhesive to the same surface as the surface of the magnetic head slider 20 and is installed to the magnetic disk-facing surface side. The active carbon is used as the gas adsorbent 30 to adsorb the gaseous siloxane which is a contaminant. As a result, the gas adsorbent 30 may be admitted between the magnetic disks which are poor in the circulating efficiency of air. The adsorption and removal efficiency of the gas sticking to the surfaces of the magnetic disks is thus enhanced.

2. 发明专利

JP2000357320A MAGNETIC DISK, ITS DEVICE AND MANUFACTURE 失效
公开(公告)号：JP2000357320A
公开(公告)日：2000-12-26
申请号：JP10876199
申请日：1999-04-16
申请人： HITACHI LTD
发明人： TANABE MASANORI , GOMI KENICHI , INOMATA YOICHI , OTSUKA MASAKI
IPC分类号： G11B5/82 , G11B5/012 , G11B5/54 , G11B5/73 , G11B5/84
摘要： PROBLEM TO BE SOLVED: To prevent damage to a medium caused by change in the posture of a head in loading and also prevent accumulation of depositions, in a loading/ unloading type magnetic disk device. SOLUTION: In the substrate 101, 201 for the manufacture of a magnetic disk, which is mounted in a loading/unloading type magnetic disk device; protrusions 102, 203 are arranged and formed in accordance with the loading position of a magnetic head in the outer peripheries of the substrate 101, 201; the projections block the magnetic head when it comes into contact with the data recording surface of the magnetic disk by changing the posture and entering at a height below the designed level in the loading at the loading position; and the protrusions also remove stains stuck to the flying surface of the head. With the purpose of reducing the contact area in the blocking by the protrusions 102, 203, the protrusions 102, 203 are given distribution in height. As a method of forming the protrusions 102, 203 with the height distribution, a laser output/focal position are controlled in a laser beam machining.

3. 发明专利

JPH10124842A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH10124842A
公开(公告)日：1998-05-15
申请号：JP27203196
申请日：1996-10-15
申请人： HITACHI LTD
发明人： HIGASHIYA TERUYOSHI , HIGUCHI SHINSUKE , OTSUKA MASAKI , AIDA TOMOYOSHI
IPC分类号： G11B5/66 , G11B5/73 , G11B5/738
摘要： PROBLEM TO BE SOLVED: To prevent dust from being embedded into a disk and from forming dents when the dust infiltrates the disk by forming a ground surface reinforcing layer consisting of a material having specific Vickers hardness between a disk substrate and a magnetic layer. SOLUTION: The reinforcing layer 20 made of aluminum oxide is formed on a disk substrate 11 made of an aluminum alloy and the magnetic layer 12, a carbon protective film 13 and a lubricating film 14 are successively formed therein. The ground substrate reinforcing layer 20 made of the aluminum oxide to be formed under the magnetic layer 12 is formed of the hard material having the Vickers hardness of

4. 发明专利

JPH09169992A BEARING, PRODUCTION OF BEARING AND MAGNETIC DISK DRIVE PRODUCED BY USING BEARING 失效
公开(公告)号：JPH09169992A
公开(公告)日：1997-06-30
申请号：JP33065595
申请日：1995-12-19
申请人： HITACHI LTD
发明人： OTSUKA MASAKI , MATSUYAMA IWAO , OGUCHI MITSUHIKO , MURAKAMI KAZUHISA , ISHII NOBUYUKI , KATSUMOTO MASAYUKI , HASEGAWA TSUNENORI , YAMAGUCHI SATOMI
IPC分类号： F16C33/66 , C10M169/00 , C10M171/00 , C10N40/02 , C10N40/18 , G11B19/20 , G11B25/04
摘要： PROBLEM TO BE SOLVED: To provide a bearing capable of preventing the adverse effect of organic gases on the environment of a magnetic head, a process for the production of the bearing and a magnetic disk drive produced by using the bearing. SOLUTION: This bearing is provided with a grease 6 composed of a thickener, a base oil and an additive, a rolling member 4 coated with the grease 6 and inner and outer rings 3, 2 rotatably holding the rolling member 4. The grease 6 is free from sustained release component composed mainly of 9-13C hydrocarbon compounds. The bearing is used as a bearing for a magnetic head actuator and a spindle of a magnetic disk drive. The use of the bearing is effective for preventing the generation of organic gas to prevent the troubles such as head crush.

5. 发明专利

JPH02226557A GUIDE MECHANISM OF ACTUATOR FOR DISK DEVICE 失效
公开(公告)号：JPH02226557A
公开(公告)日：1990-09-10
申请号：JP4301089
申请日：1989-02-27
申请人： HITACHI LTD , HITACHI COMPUTER PERIPHERALS
发明人： SUZUKI MASAMI , UNE TOKUKI , OTSUKA MASAKI , KAMIMURA NAOTO , MIHASHI HIROYUKI
IPC分类号： G11B21/02
摘要： PURPOSE:To improve the positioning accuracy of a magnetic head by stabilizing the travel of an actuator by providing a rolling element, and forming a mechanism so as to support a guide rail with a housing by bringing into contact with the rolling element. CONSTITUTION:The cross-section of the guide rail 4 is formed in hexagon, and two planes 41 and 42 are supported out of six planes. Also, a recessed part is provided at the housing 5, and balls 11a-11e are arranged in the recessed part. The balls 11a-11e are provided at five places in total: three places 11a, 11b, and 11c on the vertical plane 41 of the guide rail 4, and two places 11d and 11e on the horizontal plane 42, and the contact point of the planes with the guide rail forms the supporting part of the guide rail 4. Furthermore, the guide rail 4 is fixed on the housing 5 with a screw 12, however, a spring 13 is interposed between the screw 12 and the housing. By employing such constitution, it is possible to prevent a relative position generated between the guide rail and the housing from being fluctuated even when temperature change occurs in a magnetic disk being operated, which improves the positioning accuracy of the magnetic head by stabilizing the travel of the actuator.

6. 发明专利

JPH0192988A DISK DEVICE 失效
公开(公告)号：JPH0192988A
公开(公告)日：1989-04-12
申请号：JP24978587
申请日：1987-10-05
申请人： HITACHI LTD
发明人： EBIHARA SUSUMU , SEGA MASAHIKO , OTSUKA MASAKI , TATEYAMA KENICHI , MORIYAMA KANICHI
IPC分类号： G11B33/14
摘要： PURPOSE:To keep low moisture for a long time without incurring a large sized device or increase in number of replacement of a moisture absorbing agent by providing the 1st moisture absorbing vessel formed by storing a moisture absorbing agent having a high moisture absorbing rate into a vessel having vent holes and the 2nd moisture absorbing vessel formed by storing a moisture absorbing agent whose moisture absorbing rate is not decreased into the similar vessel. CONSTITUTION:A spindle 3 supporting a disk 2 turnably, a head and its positioning mechanism are fitted to a base 1 and they are enclosed in the inside of a medium package 5 comprising the base 1 and a cover 4. The vent hole 6 is provided with the 1st moisture absorbing agent vessel 9 absorbing moisture invaded externally from outer air via a throttle 8 and the moisture absorbing agent 13 having a high moisture absorbing rate at a high moisture is stored therein. The vent hole 7 connects to the 2nd moisture absorbing vessel 15 to absorb the moisture in the inside of the medium vessel 5 through the throttle 14 and a moisture absorbing agent 17 whose moisture absorbing rate is not decreased at a low moisture is stored therein. Thus, a low moisture is maintained for a long time with a small amount of moisture absorbing agent without incurring a large sized device or increase in the number of replacement of the moisture absorbing agent.

7. 发明专利

JPH0192987A AIR FILTER FOR MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH0192987A
公开(公告)日：1989-04-12
申请号：JP24977987
申请日：1987-10-05
申请人： HITACHI LTD
发明人： OTSUKA MASAKI , MORIYAMA KANICHI , SEGA MASAHIKO , AIDA YOSHIHIRO , EBIHARA SUSUMU
IPC分类号： G11B33/14
摘要： PURPOSE:To prevent the dust adhered initially in an air filter from being scattered by fitting a filter member having a higher capture efficiency of minute particles and fitting another filter member being more coarse than the former filter to both the air intake and suction sides of the air flow of the former filter member to the titled air filter. CONSTITUTION:A magnetic disk 8 is rotated in the direction of arrow 13, a magnetic head 11 is fitted to a positioning mechanism 9 and positioned to an object track to record and reproduce the information. The air filter 10 is arranged at a position receiving an air flow 15 caused by the rotation of the magnetic disk 8, minute dust 4 coming externally passes through a coarse filter member 2 and a captured by the filter member 1 having a high capture efficiency of minute dust. Since the coarse filter member 2 is fitted, the dust 3 adhered to the filter member 1 in the manufacture of the air filter 10 is not scattered to the outside of the filter. Thus, the dust adhered to the main filter member at the manufacture of the air filter is removed out of the main filter member due to vibration but not scattered to the outside of the air filter.

8. 发明专利

JPS62214565A RUNAWAY STOPPING DEVICE FOR MAGNETIC HEAD POSITIONING MECHANISM 失效
公开(公告)号：JPS62214565A
公开(公告)日：1987-09-21
申请号：JP5703586
申请日：1986-03-17
申请人： HITACHI LTD
发明人： SEGA MASAHIKO , KAWADA SHINICHI , MORIYAMA KANICHI , TATEYAMA KENICHI , OTSUKA MASAKI
IPC分类号： G11B21/02
摘要： PURPOSE:To prevent the damage of a voice coil at the time of the runaway of a rocking body in low temperature and to ensure floating stability of a magnetic head by forming a stopper using an elastic material and projecting contact parts that function independently in multistep. CONSTITUTION:A stopper 14 is constituted by being separated to the first and second step contacts 14a, 14b. Accordingly, when the whole stopper 14 is hardened under low temperature, a voice coil 3 comes into contact only with the first step 14a. However, rigidity is relatively small because of two step form, and collision acceleration can be made small. Consequently, the floating stability of a magnetic head 1 can be ensured. When the rocking body 5 goes to the runaway in case ambient temperature is high and the hardness of the whole stopper 14 is small, the voice coil 3 comes into contact with the first step 14a of the stopper 14 at first, and then comes into contact with the second step 14b. Accordingly, the damage due to collision of the voice coil 3 to a magnet 9 can be prevented as well. Further, the floating stability of the magnetic head 10 can be ensured since the rigidity becomes small.

9. 发明专利

JPS62137788A VIBRATION-PROOF STRUCTURE FOR MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS62137788A
公开(公告)日：1987-06-20
申请号：JP27673885
申请日：1985-12-11
申请人： HITACHI LTD
发明人： TATEYAMA KENICHI , SUZUKI TOMIO , EBIHARA SUSUMU , OTSUKA MASAKI , SEGA MASAHIKO
IPC分类号： G11B25/04 , G11B33/08
摘要： PURPOSE:To protect a magnetic disk device from external vibration when a housing for the disk device is mounted, by adding a buffer mechanism to the structure where the disk device is attached to its housing. CONSTITUTION:A shock amount 10 is held between an L support 8 and a plate 11 and fixed by a nut 14 to prevent the vibration produced toward and arrow head 15. While a buffer device is set at an approximately center part of an area where the mount 10 is installed, i.e., on the centroid line of a magnetic disk disk device to prevent the vibration produced in the radius and circumferential directions of the disk. A buffer ring 17 is put into a hole 15 of the support 8 and a ring 18 is put into the hole of the ring 17 and fixed by a bolt 19, a washer 20 and nut 21. Then the ring 18 can move within a due range owing to the presence of gaps (a) and (b). When the gap (a) overruns its range due to the external vibration, the ring 17 comes into contact with the ring 18 to attain the vibration-proof effect. While the gap (b) functions to avoid such a case where the mount 10 is extended and broken.

10. 发明专利

JPS6292182A HEAD POSITIONING MECHANISM 失效
公开(公告)号：JPS6292182A
公开(公告)日：1987-04-27
申请号：JP23111985
申请日：1985-10-18
申请人： HITACHI LTD
发明人： EBIHARA SUSUMU , MORIYAMA KANICHI , OTSUKA MASAKI , KAWADA SHINICHI , KATO KAZUO
IPC分类号： G11B21/02
摘要： PURPOSE:To reduce the track position deviation between heads of a disc device due to temperature change by decreasing the deformation of an arm support member caused at temperature change. CONSTITUTION:A fastening screw 8 is screwed to a part where a leaf spring 10 in a shape cutting a part of a cylinder is cut off to a notch 9 of a rotary shaft 7 to fix the arm support member 4 and the rotary shaft 7. When temperature change takes place, a difference of contraction/expansion due to the difference from thermal expansion takes place between the arm support member 4 and the rotary shaft 7 and the deformation of the leaf spring 10 absorbs the difference. Thus, a change in an axial force smaller by one digit order or over is enough in comparison with a large change of a fastening screw axial force caused in a conventional example where only a fastening screw is used for fixing. Thus, the change in the deformation caused to the arm support member is less and the displacement of the arm is less, then the track position deviation between heads is reduced.

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